oliverpool 67df538958 feat: cache derived keys for faster keying (#10114) ... Currently `DeriveKey` is called every time that a secret must be encoded/decoded. Since this function is deterministic, its result can be cached to allow a 250x speedup (the original took less than half a microsecond, so this more of a micro-optimization...). ``` go test -bench=. goos: linux goarch: amd64 pkg: forgejo.org/modules/keying cpu: Intel(R) Core(TM) Ultra 5 125H BenchmarkExpandPRK-18 2071627 564.2 ns/op BenchmarkExpandPRKOnce-18 541438192 2.206 ns/op PASS ok forgejo.org/modules/keying 2.369s ``` ## Other changes - Since the keys can be constructed once, it simplifies a bit the callsites (`keying.TOTP.Encrypt(...)` instead of `keying.DeriveKey(keying.ContextTOTP).Encrypt(...)`) - All `Encrypt`/`Decrypt` calls will panic forever if called before `Init` has been called (current it panics as long as `Init` has not been called) - Calling `Init` twice with different keys will trigger a panic (currently racy) - Calling `Decrypt` with a short ciphertext does not panic anymore (like when calling with long-enough garbage) Reviewed-on: https://codeberg.org/forgejo/forgejo/pulls/10114 Reviewed-by: Gusted <gusted@noreply.codeberg.org> Co-authored-by: oliverpool <git@olivier.pfad.fr> Co-committed-by: oliverpool <git@olivier.pfad.fr>		2025-11-16 14:29:14 +01:00
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task.go	feat: cache derived keys for faster keying (#10114)	2025-11-16 14:29:14 +01:00